LIQUID SAMPLE ANALYSIS DEVICE AND LIQUID SAMPLE INTRODUCTION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a high-reliability liquid sample introduction device capable of high-speed processing.

SOLUTION: An injection valve 8 has a sample storage loop 5 to be connected to a mobile phase channel feeding a sample to a detector of a liquid chromatographic device. The sample is sucked into a needle 2 via a valve 16 and a tube 13 by a syringe 11, introduced into the sample storage loop 5, and fed to the mobile phase channel. A cleaning liquid is fed from cleaning liquid bottles 20 and 21 to the needle 2 via the valve 16 and the tube 13 by a cleaning unit 15 to clean an inner wall of the needle 2. The cleaning liquid is fed from the cleaning liquid bottle 20 to a cleaning bath 10 via the valve 16 and a tube 31 by the cleaning unit 15, and an outer wall of the needle 2 is cleaned by the cleaning bath 10.

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